Device for eliminating throw-off yarn in winding machines



y 0, 1965 R; BECKER 3,195,822

DEVICE FOR ELIMINATING THROW-OFF YARN IN WINDING MACHINES Filed Aug. 28, 1963 2 Sheets-Sheet 1 y 0, 1965 R. BECKER 3,195,822

DEVICE FOR ELIMINATING THROW-OFF YARN IN WINDING MACHINES Filed Aug. 28, 1963 2 Sheets-Sheet 2 rocating guiding motion reverses its direction.

United States Patent C EJ595322 DEVICE FOR ELIMINATENG THROW-OFF YARN KN WlNDlNG MACHINES Rudolf Becker, Charlotte, N.C., assignor to Walter Reiners, Monchen-Gladhach, Germany Filed Aug. 28, 1963, Ser. No. 305,084 12 Claims. (Cl. 24-2-49) My invention relates to machines for Winding yarn packages, such :as cheeses or cones, of a shape and size desired for further fabrication from yarn supplied in the form of bobbins, spinning cops, or like supply coils.

When the yarn running onto the package of the takevup spool in such machines becomes broken or otherwise interrupted, for example by depletion of a replaceable supply coil before the take-up spool is fully wound, the wind-up drive of the machine is stopped. Due to its momentum, however, the take-up spool continues to coast for some time during which the yarn end of the take-up spool is wound up on the spool and normally places itself about the spool periphery. Since the oncoming yarn during the winding operation is guided back and forth along the spool peripheral surface, the broken yarn end is sometimes flung laterally with such a force that .it does not place itself upon the periphery of the spool but passes beyond the peripheral surface in the axial direction and is then placed over one of the end faces of the spool. The yarn laterally thrown off in this manner, often simply called throw-off, may even become Wound upon the tubular core upon which the yarn package of the take-up spool is being wound and which axially protrudes from the package.

In manually serviced winding machines, when a winding station is stopped on account of yarn breakage, an attendant seizes the yarn end located on the take-up spool and then ties this end together with the one coming from the supply coil. In such cases, the occurrence of throwoff requires prolonged servicing time and a correspondingly prolonged period of stoppage at the winding station. In automatic winding machines, in which the seizing of the yarn ends and the knotting of these ends together is effected automatically, the yarn end previously run onto the take-up spool is seized by a yarn-seeking device such as a suction nozzle. Such a device, however, acts only upon the peripheral surface of a take-up spool. Any yarn laterally thrown off can thus not be seized, so that the winding station is not automatically reset to operating condition. In this case, the winding station completely fails and can resume its winding operation only after a service man has placed the thrown off yarn upon the peripheral surface of the take-up spool or has joined this end with the yarn end coming from the supply coil.

I For minimizing the above-mentioned deficiencies, it has been proposed to prevent the occurrence of throw-off by limiting the lateral reciprocating travel of the yarn being wound. A travel-path limiting structure is placed opposite the yarn guide between its yarn-entering point and the yarn-exit point in the region within which the recip- Such devices serve to prevent the yarn from passing beyond the lateral planes determined by the reversing locations of the yarn guide so that no throw-off can occur. While such limiting means have reduced the frequency of throwolf occurrence, they do not always prevent the formation of throw-off.

It is an object of my invention to reliably eliminate the operational disturbances and delays resulting from inevitable yarn throw-off at the pickup spool and to thus further increase the efliciency and economy of machine operation.

T this end, and in accordance with a feature of my invention, I provide a winding machine, generally of the above-mentioned type, with means that sever the yarn end that may become laterally thrown off the peripheral surface of the take-up spool in the event of yarn breakage, or yarn depletion, the severing location being placed between the peripheral surface of the yarn package that is being wound and the appertaining core of the spool. The yarn end remaining after the severing operation and extending from the periphery of the spool to the severing location is hung outwardly by centrifugal force during rotation of the take-up spool which is then coasting down to standstill, and is thereby placed upon the peripheral surface of the spool so that it can be seized by the yarn-end seeking device of the machine for initiating a yarn-knotting operation.

The invention is based upon the observation that a thrown off end of yarn always extends from the periphery toward the core of the spool at a substantially given distance from the adjacent front side of the spool. According to another feature of my invention, therefore, a severing device is preferably used whose severing memher is normally mounted in stationary relation to the spool axis and hence to the machine components for journalling the spool core, the severing location of the member being near the front side or axial end face of the takeup spool. According to another, more specific feature of my invention, the severing member is fixedly mounted on the frame structure in which the spool core is revolvably mounted.

The foregoing and other objects, advantages and features of my invention, said features being set forth with particularity in the claims annexed hereto, will be apparent from, and will be mentioned in, the following with reference to embodiments of devices according to the invention illustrated by way of example on the accompanying drawings in which:

FIG. 1 is explanatory and shows schematically a winding station with respect to the yarn path from the supply coil to the take-up spool and illustrating lateral throw-off of a yarn end.

FIG. 2 is a lateral View of a take-up spool and shows a different form in which lateral throw-off may occur.

FIG. 3 is a front view of a device according to the invention in conjunction with a partial illustration of cheesewinding components; and

FIG. 4 is a top view of the same device and components.

FIGS. 5 and 6 are respective front views of two other devices according to the invention illustrated in the manner set forth above with reference to FIG. 3.

FiGS. 7 and 8 are similarly illustrated front views of two different devices according to the invention equipped with respective feelers for maintaining a constant distance between a cutting member and the take-up spool; and

FIG. 9 is a partly sectional front view of still another device according to the invention.

The winding station represented in FIG. 1 may form part of a multi-station automatic winding machine. The yarn F passes from a supply coil 1 such as a spinning cop through a yarn tensioner 2 to a yarn-guiding drum 3 from which it passes onto the take-up spool 4. During operation of the winding station the shaft of the guiding drum 3 is driven at constant speed. The guiding drum has the conventional guiding groove in its surface which forms a loop peripherally around the drum and extending also axially along the drum so that the yarn, passing through the groove, is reciprocated along the take-up spool 4 as it is wound onto the spool, thus forming a cross-wound yarn package called cheese if of cylindrical shape, and usually called cone if of conical shape. The take-up spool core 4b, usually of tubular shape, is rotatably mounted in a frame structure (7 in FIG. 9) which is pivoted to the machine frame so that the take-up spool rests against the periphery of the guiding drum 3 under its own weight and the weight of the journalling frame. Thus, the'take-up spool 4 is frictionally entrained by the guiding drum 4 to rotate at constant peripheral speed, the rotating direction being, in-

dicated by an arrow lit in FIG. 1. 1 7

When the yarn breaks, for example at B, then the end P continues to be wound upon the takeup spool 4 because the spool continues'rotating for some additional time although the automatic sensing means of the machine have stopped the drive, or have lifted the spool off the guiding drum. During the coasting interval, it may happen, as explained above, that the yarn end P will laterally fling away from the axial limits of the package peripheral surface and that the thrown off yarn becomes wound upon the protruding end of thespool core 412, occupying for example the position schematically indicated at in FIG. 1. Ayarn-seeking device designed as a suction tube is thereafter effective along the peripheryda of the package in order'to induct'the yarn the location end from this package and, by conveying movement of the device 6, pass it to a knotting device (not shown) where the end is tied together with the yarn end from.

the supply coil L'then conveyed to the knotter by a similarl o eratin arn-seekin device. However, when the x g Y yarn end P from the take-up spool is laterally'thrown off and located at 5, the seeking device 6 cannotfind the end, so that the knotting operation is not performed, and the winding station is not returned to operative condition and will not resume the winding performance until it is manually attended to. a I

This disadvantageous condition becomes aggravated in some cases where the thrown off yarn becomes wound about itself, as is schematically shown at 5' in FIG. 2. Appreciable time is sometimes needed to disentangle and remove the yarn. v V v The peripheral surface 4a of the yarn package on the take-up spool 4 is visible in.FIG, 3 from the front, together with the axially protruding end of the tubular spool core 4b with a yarn end laterally thrown OE and wound about the core atfic. A severing member 8 in the form of a cutter blade isfastened to one of the ,core- 9 journalling parts of the journalling frame 7 bymeans of a screw d. The severing location 8a of member 8 is in the vicinity of the adjacent lateral front face 4c of the spool so that during rotation of the spool the thrown off yarn end must constrainedly comeinto the range of the severinglocation 3a and is thereby cut; The upper end So of the severed yarn portion is then thrown about by centrifugal force and assumes approximately the posi-[ tion indicated by the. broken line 5b so that it lies up against the peripheral surface 4a when the spool 4 ultimately stops. The severed end portoin 5c is flung away.

also be given spherical shape.

. By virtue of the fact that the component severing membe'rs 8 and 8 according to FIG. 5, extend approximately parallel to a radius of the spool, possible damage to a laterally bulging spool is largely prevented. However, a further improvement in this respect is attained by having the forward end of the severing member extend ata slight inclination away fromthe spool body as exemplified by the embodiment shown in FIG. 6. With such a structure, damage to a bulging spool can be reliably prevented, particularly if the severing member is resiliently mounted. In the device according to FIG. 6 the resi ient mounting of the severing location 8a is effected by designing the entire severing member 8 as a spring. The forward end of the member 8, constituting the severing location 8:1,eXtends approximately parallel to the spool radius and points at a slight inclination away from the spool body or package being wound. In the event of considerable bulging at the spool front face, the active portion 'of the severing member can yield axially to the position 8b indicated by broken lines. The portion 8c of the severing member extending farthest toward the which senses the approach of the bulging front face and thus adjusts the severing member or its cutting edge 8a to constant spacing from the front side of thespool. The thrown off. yarn in this embodiment is. severed by the cutting edge at Sr: into the two yarn portions denoted by 5a and 5c.

, FIGS. 7 and 8 show two further embodimentsfor'automatic adjustment of the spacingbetween the severing member 8 and the front side 4c of the take-up spool. In the device: shown in FIG. 7 the severing member 8 is connected with a feeler 11' whicl touches the front side of the spool under theaction of a biasing spring. For this purpose there is used a helical compression spring 12 which rests against a part 7' of the journalling frame 7 .and presses a curved end. portion 11 of the feeler 11 toward the spool. The curved portion'11 is outwardly so rounded as to reliably prevent damaging the front side of the spool during rotation and, if desired, may The, severing member 8 and'thefeeler 11 consist of a single piece and: are guided by means of'a slot traversing the aligned screws 13. As soon asthe spool side. 40 bulges laterally, the feeler 11 displaces the severing member 8 towards the left so that the front side of thespool cannot be damaged by the cutting edge or end point' ofrthe member 8.

tuted by a pivotal mounting of the severing. member 8.

.The member 8 in the embodiment shown in FIG. 8, is constructed as an arm which is pivotally mounted by means of a pivot pin 8d on the spool frame 7. The

The direction of rotation in FIG. 3 is indicated by an arrow 10 corresponding'to the arrow 10 in FIG. 1. I

A top View of the same embodiment shown in FIG. 4

eXhibitsmOre clearly the severing location of. member 8, this location forming a cutting edgeor knife of slightly hook-shaped configuration. 'The thrown off yarn 5 runs against the concavelycurved cutting edge 8a and is thus severed, as described above with reference to FIGI3.

The front side of some spools, particularly soft cheeses,.

are sometimesslightly squeezed out of the cylindrical package in the axial;direction, In-this event, a sever-v ing member formed as shown in FIG. 4 might cause injury, such as ripping, at this spool side, It is therefore I which the thrown off yarn 5 is seizedand is cut off upon 7 gliding into the angle between the two blades.

forward end of the arm isdesigned as a cutting edge 8a.

A roller 13 is journalled on a pin 13a fastened to'the severing member 8 and touches the front face 40 of the take-up spool. ,The roller 13 thus turns the severing member'8 with the cutting edge 8a, depending upon the amount of bulging which the spool may exhibit.

'In the above described embodiments which afford an automatic adjustment of thesevering member to provide constant spacing thereof from the spool front side, as well asin embodiments witha normally fixed severing member according to FIGS. 3',v 4 and 5, it isof advantage to make the norma l distance of thesevering member. from the front side of the take-up-spool adjustable. For this purpose,'tl1e severing member can be provided with a slot guide. 9, as shown in, FIG. 4, for example, which permits axial shifting of the severing member 8 after loosening the. fastening screw 9, the severing member being then fastened in the proper position, In the embodiment DfFIG. 7, the feeler 11 or the severing merndevice according to FIG. 8, the pivot pin 8d can be fastened in a guide slot of frame 7 extending parallel to the spool axis to thereby adjust the desired normal distance of the cutting edge from the spool front face.

In order to prevent servicing personnel from being injured by the severing member when removing a filled spool, it is preferable to provide a protective cover, for example of sheet metal, which covers the severing member at the time the take-up spool is removed from the spool holder. An embodiment of this type is shown in FIG. 9. The tubular core 4b of the take-up spool d is journalled on a dowel which is .axially displaceable in the journalling frame 7 by means of a handle 16 and is normally forced into journalling position by means of a helical compression spring 15. A severing member 8 formed as a cutting blade is joined with the dowel to move axially together therewith. When the device is in operating condition, the severing member 8 occupies the full-line position and is then capable of functioning in the manner described above with reference to the preceding embodiment. For removing a filled spool, the dowel 14, normally protruding into the tubular spool core 4b, is pulled toward the left by means of the button 16 and in opposition to the force of spring 15, so that the button 16 reaches the position 16' shown by broken lines. The severing member, protruding through an axially extending slot 7a of the journalling structure 7, is entrained by the dowel 14 and passes to the position 8e shown by broken lines. In this position the severing member 8 is beneath a cover 17 of sheet metal which is fastened to the journa lling frame 7 by means of a screw 18. As a result, the person manipulating the device for removing the completed yarn package is protected from being injured by the cutting edge of the severing member.

It will be understood that, generally, a severing device according to the invention is to be provided on each of the two core ends of the take-up spool to take care of the possibility that the yarn may be thrown off in one or the other axial direction. Since the two devices are preferably identical, however, only one of each type is described in the foregoing.

Upon a study of this disclosure it will be obvious to those skilled in the art that my invention affords a variety of modifications and can be given embodiments other than particularly illustrated and described herein, without departing from the essential features of my invention and within the scope of the claims annexed hereto.

I claim:

1. With a machine for winding yarn packages, particularly cross-wound coils on cores, having holder means for journalling a core at the core ends, in combination a device for eliminating winding on a core end of lateral yarn throw-01f from the package being wound, said device comprising yarn severing means mounted near a journalled core end and axially beside the package area of the core, said severing means having a cutting edge at a location between the core and the package periphery in the path of yarn laterally thrown off the package whereby said cutting edge is engageable with the throw-off yarn for severing the yarn at said location.

2. A yarn throw-oh severing device according to claim 1, comprising a cover structure on said holder means, said severing means being located beneath said cover structure when the core is removed from said holder means.

3. With a machine for winding yarn packages, particularly cross-wound coils on cores, having holder means for j-ournalling a core at the core ends, in combination a device for eliminating winding on a core end of lateral yarn throw-off from the package being Wound, said device being mounted in normally fixed connection with said holder means and having a yarn-severing member at a core end axially beside the package area of the core for severing throw-off yarn from the package between the core and the periphery of the package being wound.

4. In a yarn throw-off severing device according to claim 3, said severing member having a concave cutting edge facing the winding direction.

5. In a yarn throw-off severing device according to claim 3, said severing member having two cutter blades joined in scissors arrangement, the scissors-opening facing the winding direction.

6. In a yarn throw-off severing device according to claim 3, said severing member having a cutting edge extending approximately parallel to a radius of core rotation and being inclined inwardly and axially away from the package being wound.

7. In a yarn throw-oif severing device according to claim 3, said severing member having setting means for adjusting its axial spacing from the package being wound.

8. With a machine for winding cross-wound yarn packages onto tubular cores, having a rotating yarn-guiding drum for reciprocating the oncoming yarn axially along the package being driven from the drum and having holder structure coaxially engageable with the core ends for journalling the core, said holder structure being movable toward and away from said drum, in combination a device for eliminating winding on a core end of lateral yarn throw-off from the package being wound, said device comprising yarn-severing means mounted on said holder structure to move together therewith and located at said respective core ends axially beside the package area of the core for severing throw-ofi yarn from the package between the core and the periphery of the package being wound.

9. With a machine for winding yarn packages, particu larly cross-wound coils on cores, having holder means for journalling a core at the core ends, in combination a device for eliminating winding on a core end of lateral yarn throw-off from the package being wound, said device comprising a yarn-severing member located at a core end axially beside the package area of the core for severing throw-off yarn from the package between the core and the periphery of the package being wound, and elastic mounting means yieldingly connecting said severing member to said holder means.

10. With a machine for winding yarn packages, particularly cross-wound coils on cores, having holder means for journalling a core at the core ends, in combination a device for eliminating winding on a core end of lateral yarn throw-ofr from the package being wound, said device comprising a yarn-severing member located at a core end axially beside the package area of the core for severing throw-oif yarn from the package between the core and the periphery of the package being wound, a springbiased feeler member displaceably mounted on said holder means and movable in a direction parallel to the journal axis into engagement with the adjacent axial side of the package, said severing member being connected with said feeler member to be thereby adjusted to constant axial spacing from the package.

11. With a machine for winding yarn packages, particularly cross-wound coils on cores, having holder means for journalling a core at the core ends, in combination a device for eliminating winding on a core end of lateral yarn throw-off from the package being wound, said device co-mprising yarn severing means mounted near a journalled core end and axially beside the package area of the core, said severing means being engageable with throw-off yarn at a location between the core and the package periphery for severing the yarn at said location, said holder means having a dowel member axially engageable with the core and releasing means for withdrawing said dowel member to release a completed yarn package, said severing means being connected with said releasing means to be withdrawn from said severing location when a package is released, and a protective cover mounted on said holder means and covering said severing means when the latter is in withdrawn position.

12. With a machine for winding yarn packages, particularly cross-Wound coils on cores, having holder means for journalling a core at the core ends, in combination a device for eliminating winding on a core end of lateral .7

yarn throW-ofifrom the package being Wound; said'device comprising a yarn-severing member located at a core a I end axially beside the package area of the core for severing throw-off yarn from the package between/the core and the periphery'of the package being wound, an engagement member pivotally mounted on said holderv a a aa being conne'ctedWith said engagement member and adjustably pivotable therewith to constant axial spacing from the vpackage.

References Cited by the Examiner UNITED STATES PATENTS 8/06 Leonard Q 242-19 2,718,360 9/55 Joyce 24219 X r 2,759,540 8/56 'B onneau 242-19 X 0 MERVIN STEIN, Primary Examiner. 

1. WIH A MACHINE FOR WINDING YARN PACKAGES, PARTICULARLY CROSS-WOUND COILS ON CORES, HAVING HOLDER MEANS FOR JOURNALLING A CORE AT THE CORE ENDS, IN COMBINATION A DEVICE FOR ELIMINATING WINDING ON A CORE END OF LATERAL YARN THROW-OFF FROM THE PACKAGE BEING WOUND, SAID DEVICE COMPORISING YARN SEVERING MEANS MOUNTED NEAR A JOURNALLED CORE END AND AXIALLY BESIDE THE PACKAGE AREA OF THE CORE, SAID SEVERING MEANS HAVING A CUTTING EDGE AT A LOCATION BETWEEN THE CORE AND THE PACKAGE PERIPHERY IN THE PATH OF YARN LATERALLY THROWN OFF THE PACKAGE WHEREBY SAID CUTTING EDGE IS ENGAGEABLE WITH THE THROW-OFF YARN FOR SEVERING THE YARN AT SAID LOCATION. 